This rewrite is showcased by Anthropic to sell AI rewrites to other companies.

If it turns out the rewrite cost stupid amounts of money and leads to a bad outcome, it's just a misleading ad.

We developers now need to explain that to illuminated management and colleagues.

So you think if a company can't spend 1 million USD on a rewrite which has almost zero impact on performance, possibly net negative on maintainability it also can't have 500k LOC codebase either? Oh come on...